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🏔️ The Alps: how Europe's mountains formed

Follow the Alps from the vanished Tethys Ocean through subduction, continental collision, thrusting, uplift, and the glaciers that carved the range we see today.

4
lessons
~30 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. Before the mountainsTrace the Alps from the opening and closure of the Tethys Ocean to subduction before continental collision.The Alpine story began with oceanic crust and sediments between Europe and Africa, then moved through northward subduction.
  2. Collision builds thick crustExplain how continental collision produces nappes, thrusts, folds, and a thick buoyant crustal root.Compression stacked and deformed rock sheets, creating the structural architecture of the Alpine range.
  3. Rocks remember pressureUse rocks, maps, uplift, and erosion as evidence for the Alps' complex geological history.Alpine materials preserve the sequence of deposition, burial, metamorphism, thrusting, uplift, and sediment removal.
  4. Ice reshapes the rangeDistinguish tectonic mountain building from glacial carving and connect both to present-day change.Glaciers sculpted the relief produced by collision, while tectonic strain, erosion, and ice continue to alter the range.

Questions this course answers

What happened before the African and European continental crusts collided?

Oceanic lithosphere of the Tethys was subducted before the buoyant continental blocks collided.

Why do continental collisions build thick crust?

Continental crust is relatively buoyant, so compression is accommodated by folding, thrusting, and crustal thickening.

What does the Glarus Thrust demonstrate?

The famous structure exposes older Permian rocks transported over younger strata during Alpine compression.

Which statement best separates tectonic and glacial work?

The mountain-building collision produced relief, while flowing ice strongly reshaped that relief at the surface.

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